As of 00:08 EDT

Herndon, VA weather in May

75°

Herndon, Sunday, 9 August, 00:08

Overcast. Feels like 76°. High 89°, low 73°.

Pressure30.00 inHg

Wind5.4 mph W

Humidity83%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

In May, Herndon, VA averages a high of 73.2° and a low of 54.1°. About 4.1 inches of precipitation fall over the month (12 wet days). The record high is 95.7° (2022) and the record low 32.7° (2020). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	70.5°	50.4°	33%	86.9° (2010)	38.3° (1963)
2	72.1°	51.3°	37%	88.5° (2024)	37.8° (1978)
3	69.8°	51.3°	38%	89.4° (2018)	36.7° (2005)
4	68°	50.4°	45%	91.9° (2018)	36.5° (1986)
5	69.1°	49.6°	48%	84.2° (2000)	37.4° (1966)
6	69.4°	50.5°	38%	86.5° (1986)	40.8° (1983)
7	69.8°	49.8°	35%	87.4° (2000)	36.9° (1970)
8	70.3°	51.3°	50%	86.5° (2000)	39.2° (2021)
9	69.8°	50.7°	33%	91° (1963)	32.7° (2020)
10	71.4°	51.3°	25%	92.1° (1963)	34° (1966)
11	72.5°	52°	30%	86.4° (1985)	34.7° (1966)
12	72.7°	52.9°	38%	91.6° (2018)	37.8° (2020)
13	71.1°	53.2°	30%	90.5° (2000)	37.2° (2020)
14	71.6°	52.3°	33%	86.9° (1985)	36.1° (1996)
15	73.8°	54.5°	42%	91.2° (1962)	42.1° (1984)
16	73.2°	54°	45%	87.1° (1998)	40.8° (2016)
17	72.7°	54.7°	38%	90.7° (2017)	37° (1984)
18	72.7°	54.1°	48%	92.7° (1962)	40.6° (1973)
19	73.8°	55.2°	42%	92.7° (1962)	41° (2003)
20	74.8°	55.4°	28%	92.8° (2022)	39.6° (2002)
21	74.3°	55.2°	32%	93.6° (2022)	37° (2002)
22	75.4°	55.4°	37%	93.4° (2021)	38.8° (2002)
23	75.4°	56.7°	47%	93.4° (2021)	42.6° (2002)
24	75.9°	56.8°	37%	88.3° (1962)	40.3° (1963)
25	75.7°	57.2°	40%	91.2° (1991)	41.5° (1967)
26	76.6°	57.7°	40%	91.9° (1991)	46.2° (1972)
27	75.2°	57.7°	40%	92.3° (2010)	41.5° (1972)
28	76.1°	57.7°	43%	90.1° (2012)	42.8° (1961)
29	77.5°	58.6°	40%	95° (1969)	45.5° (1997)
30	77.9°	59°	37%	95.2° (2006)	45.1° (1996)
31	79.5°	59.9°	32%	95.7° (2022)	43.7° (1996)